1 /// <summary>
2 /// 枚举转化下拉列表数据集
3 /// </summary>
4 /// <param name="type">类型</param>
5 /// <param name="selected">选中项</param>
6 /// <returns>结果</returns>
7 public static IEnumerable<SelectListItem> EnumToListItem(Type type, string selected)
8 {
9 IList<SelectListItem> list = new List<SelectListItem> { new SelectListItem { Text = "全部", Value = string.Empty } };
10 Array array = Enum.GetValues(type);
11 foreach (int item in array)
12 {
13 string text = Enum.GetName(type, item);
14 var selectListItem = new SelectListItem
15 {
16 Text = text,
17 Value = item.ToString(CultureInfo.InvariantCulture),
18 Selected = !string.IsNullOrEmpty(selected) && selected == text
19 };
20 list.Add(selectListItem);
21 }
22
23 return list;
24 }
25
26 /// <summary>
27 /// 自定义DropDownList
28 /// </summary>
29 /// <param name="htmlHelper">htmlHelper</param>
30 /// <param name="name">name</param>
31 /// <param name="selectList">下拉列表集合</param>
32 /// <param name="obj">属性</param>
33 /// <returns>MvcHtmlString</returns>
34 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, string name, IEnumerable<SelectListItem> selectList, object obj)
35 {
36 string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
37 if (string.IsNullOrEmpty(fullName))
38 {
39 throw new ArgumentException("name");
40 }
41
42 StringBuilder listItemBuilder = new StringBuilder();
43 foreach (SelectListItem item in selectList)
44 {
45 TagBuilder builder = new TagBuilder("option")
46 {
47 InnerHtml = HttpUtility.HtmlEncode(item.Text)
48 };
49
50 if (item.Value != null)
51 {
52 builder.Attributes["value"] = item.Value;
53 }
54
55 if (item.Selected)
56 {
57 builder.Attributes["selected"] = "selected";
58 }
59
60 listItemBuilder.AppendLine(builder.ToString(TagRenderMode.Normal));
61 }
62
63 TagBuilder tagBuilder = new TagBuilder("select")
64 {
65 InnerHtml = listItemBuilder.ToString()
66 };
67
68 if (obj != null)
69 {
70 IDictionary<string, object> htmlAttributes = new RouteValueDictionary(obj);
71 tagBuilder.MergeAttributes(htmlAttributes);
72 }
73 tagBuilder.MergeAttribute("name", fullName, true);
74 tagBuilder.GenerateId(fullName);
75
76 return new MvcHtmlString(tagBuilder.ToString(TagRenderMode.Normal));
77 }
78
79 /// <summary>
80 /// 自定义DropDownList
81 /// </summary>
82 /// <param name="htmlHelper">htmlHelper</param>
83 /// <param name="name">name</param>
84 /// <param name="selectList">下拉列表集合</param>
85 /// <returns>MvcHtmlString</returns>
86 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, string name, IEnumerable<SelectListItem> selectList)
87 {
88 return DropDownList(htmlHelper, name, selectList, null);
89 }
90
91 /// <summary>
92 /// 自定义DropDownList
93 /// </summary>
94 /// <param name="htmlHelper">htmlHelper</param>
95 /// <param name="type">枚举类型</param>
96 /// <param name="name">name属性</param>
97 /// <param name="selected">选择项目</param>
98 /// <param name="obj">其他属性</param>
99 /// <returns>DropDownList</returns>
100 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, Type type, string name, string selected, object obj)
101 {
102 IEnumerable<SelectListItem> selectListItem = EnumToListItem(type, selected);
103 return DropDownList(htmlHelper, name, selectListItem, obj);
104 }
105
106 /// <summary>
107 /// 自定义DropDownList
108 /// </summary>
109 /// <param name="htmlHelper">htmlHelper</param>
110 /// <param name="type">枚举类型</param>
111 /// <param name="name">name属性</param>
112 /// <param name="selected">选择项目</param>
113 /// <returns>DropDownList</returns>
114 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, Type type, string name, string selected)
115 {
116 return DropDownList(htmlHelper, type, name, selected, null);
117 }
118
119 /// <summary>
120 /// 自定义DropDownList
121 /// </summary>
122 /// <param name="htmlHelper">htmlHelper</param>
123 /// <param name="type">枚举类型</param>
124 /// <param name="name">name属性</param>
125 /// <param name="obj">其他属性</param>
126 /// <returns>DropDownList</returns>
127 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, Type type, string name, object obj)
128 {
129 return DropDownList(htmlHelper, type, name, null, obj);
130 }
131
132 /// <summary>
133 /// 自定义DropDownList
134 /// </summary>
135 /// <param name="htmlHelper">htmlHelper</param>
136 /// <param name="type">枚举类型</param>
137 /// <param name="name">name属性</param>
138 /// <returns>DropDownList</returns>
139 public static MvcHtmlString DropDownList(this HtmlHelper htmlHelper, Type type, string name)
140 {
141 return DropDownList(htmlHelper, type, name, null, null);
142 }
